PENSION AND POSTRETIREMENT BENEFITS - Schedule of Pension Plan Weighted-Average Asset Allocations and Target Asset Allocations (Details) - USD ($) $ in Millions	May 26, 2024	May 28, 2023
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	100.00%	100.00%
Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		$ 158.3
Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	5.00%	4.00%
Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		$ 78.5
Defined Benefit Plan, Debt Security [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	86.00%	84.00%
Defined Benefit Plan, Real Estate [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	1.00%	1.00%
Private Equity Funds [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	4.00%	4.00%
Other Plan Asset Category [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	4.00%	7.00%
Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	$ 2,738.9	$ 2,948.5
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	2.2	5.7
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	71.0
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	34.8	59.0
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		34.4
Fair Value, Inputs, Level 1 [Member] | Receivable For Unsettled Transactions [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	20.6	2.6
Fair Value, Inputs, Level 1 [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	87.4	101.7
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	75.3	152.6
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	24.0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		19.5
Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	508.1	562.2
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	1,797.6	1,878.1
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage-Backed Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	53.3	22.0
Fair Value, Inputs, Level 2 [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	2,458.3	2,634.4
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	77.5
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	95.0
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	34.8
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		34.4
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | US Treasury and Government [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	508.1	562.2
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Corporate Debt Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	1,797.6	1,878.1
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Collateralized Mortgage-Backed Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	53.3	22.0
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Receivable For Unsettled Transactions [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	20.6	2.6
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	2,545.7	2,736.1
Fair Value Measured at Net Asset Value Per Share [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	$ 193.2	$ 212.4